To appear or arise unexpectedly or suddenly.
突然出现：出其不意地突然出现或显现
make rapid bodily movements up and down and from side to side, for example as an evasive tactic by a boxer
身体左挡右闪
try to catch floating or hanging apples with one's mouth alone, as a game
咬苹果游戏（用嘴巴咬住浮动或悬挂着的苹果的游戏）